CN105421509A - Movable arm potential energy recovery device of hybrid power excavator and hybrid power excavator - Google Patents
Movable arm potential energy recovery device of hybrid power excavator and hybrid power excavator Download PDFInfo
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- CN105421509A CN105421509A CN201510788265.7A CN201510788265A CN105421509A CN 105421509 A CN105421509 A CN 105421509A CN 201510788265 A CN201510788265 A CN 201510788265A CN 105421509 A CN105421509 A CN 105421509A
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- mouth
- control valve
- cylinder
- movable arm
- oil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The invention relates to the technical field of excavators, in particular to a movable arm potential energy recovery device of a hybrid power excavator and the hybrid power excavator. The device comprises a movable arm cylinder, a hydraulic pump/motor assembly (the hydraulic pump or motor assembly) and a movable arm cylinder control valve. The movable arm cylinder control valve is provided with a port A, a port B, a port P, a port T and a port D; when the movable arm of the excavator ascends, the port A and the port P of the movable arm cylinder control valve are communicated, the port B and the port D of the movable arm cylinder control valve are communicated, and the port D of the movable arm cylinder control valve is connected with a fuel tank. When the movable arm of the excavator descends, the port A and the port T of the movable arm cylinder control valve are communicated, and the port B and the port P of the movable arm cylinder control valve are communicated. A large cavity of the movable arm cylinder is connected with the port A. A small cavity of the movable arm cylinder is connected with the port B. An oil outlet of the hydraulic pump/motor assembly is connected with the port P, and an energy recovery and reusing oil way is connected with the port T. In this way, when the movable arm of the excavator descends, the large cavity of the movable arm cylinder is kept in communication with an oil inlet of the hydraulic pump/motor assembly, and accordingly potential energy of the movable arm of the excavator is recycled.
Description
Technical field
The present invention relates to excavator technical field, particularly relate to a kind of hybrid excavator movable arm potential energy retracting device and hybrid excavator.
Background technology
Generally, when descending movable arm of excavator, the oil-feed of boom cylinder loculus, the oil return of large chamber.Usually the oil return in large chamber directly enters oil return circuit by boom cylinder control valve internal galleries; Or fraction fluid enters loculus oil feeding line recycling by the regenerative circuit of boom cylinder control valve inside, all the other most of oil returns directly enter oil return circuit by boom cylinder control valve internal galleries.But due to the existence of movable arm potential energy when swing arm declines, the oil return of large chamber has a lot of energy, if allow fluid directly enter oil return circuit in a manner described, a kind of huge waste beyond doubt.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is the problem that existing excavator swing arm causes potential energy to waste when frequent landing.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of hybrid excavator movable arm potential energy retracting device, it comprises:
Boom cylinder control valve, described boom cylinder control valve is provided with A mouth, B mouth, P mouth, T mouth and D mouth; Described boom cylinder control valve, when excavator swing arm lifting, makes that its A mouth and P mouth are connected, B mouth and D mouth connect, and described D mouth is connected with fuel tank; Described boom cylinder control valve, when descending movable arm of excavator, makes that its A mouth and T mouth are connected, B mouth and P mouth connects;
Boom cylinder, the large chamber of described boom cylinder is connected with A mouth; The loculus of described boom cylinder is connected with B mouth;
Hydraulic pump/motor assembly, the oil-out of described hydraulic pump/motor assembly is connected with P mouth, and its oil-in is connected with fuel tank by one-way control valve, is connected with energy regenerating and recycles oil circuit between this oil-in and described one-way control valve; Described energy regenerating recycling oil circuit is connected with T mouth, for making to keep being communicated with between the large chamber of described boom cylinder and the oil-in of described hydraulic pump/motor assembly when descending movable arm of excavator.
Wherein, described boom cylinder control valve is connected with the first signaling control unit and secondary signal control unit;
When described excavator swing arm lifting, described first signaling control unit controls described boom cylinder control valve and switches to left position, makes that A mouth and P mouth are connected, B mouth and D mouth connect;
When described descending movable arm of excavator, described secondary signal control unit controls described boom cylinder control valve and switches to right position, makes that A mouth and T mouth are connected, B mouth and P mouth connect.
Wherein, described energy regenerating recycling oil circuit is provided with the pressure-control valve of shunting, and described pressure-control valve is connected with fuel tank.
Wherein, described pressure-control valve is overflow valve or safety valve, and the oil pressure relief of described pressure-control valve is set to 5-15MPa.
Wherein, the oil-out of described hydraulic pump/motor assembly is also connected with mechanism loading, described mechanism loading comprise in bucket arm cylinder, bucket cylinder, rotary motor or running motor one or more.
Wherein, described bucket arm cylinder is connected with the oil-out of described hydraulic pump/motor assembly by bucket arm cylinder control valve, and described bucket arm cylinder control valve is connected to the 3rd signaling control unit and the 4th signaling control unit;
When described bucket arm cylinder needs extend action, described 3rd signaling control unit controls described bucket arm cylinder control valve and switches to right position, makes the fluid flowed out from oil-out enter the large chamber of described bucket arm cylinder;
When described bucket arm cylinder needs withdrawal action, described 4th signaling control unit controls described bucket arm cylinder control valve and switches to left position, makes the fluid flowed out from oil-out enter the loculus of described bucket arm cylinder.
Wherein, described bucket cylinder is connected with the oil-out of described hydraulic pump/motor assembly by bucket cylinder control valve, and described bucket cylinder control valve is connected to the 5th signaling control unit and the 6th signaling control unit;
When described bucket cylinder needs extend action, described 5th signaling control unit controls described bucket cylinder control valve and switches to right position, makes the fluid flowed out from oil-out enter the large chamber of described bucket cylinder;
When described bucket cylinder needs withdrawal action, described 6th signaling control unit controls described bucket cylinder control valve and switches to left position, makes the fluid flowed out from oil-out enter the loculus of described bucket cylinder.
Wherein, described boom cylinder is one or more in single oil cylinder, two oil cylinder and Multi-cylinder.
Wherein, described energy regenerating recycling oil circuit is connected with accumulator.
The present invention also provides a kind of hybrid excavator, and it comprises described hybrid excavator movable arm potential energy retracting device.
(3) beneficial effect
Technique scheme of the present invention has following beneficial effect: the present invention is directed to existing excavator swing arm in the process of frequent landing, the shortcoming of its potential energy waste, a kind of novel hybrid excavator movable arm potential energy retracting device is provided, recycling is carried out to the potential energy that descending movable arm of excavator produces, improve excavator capacity usage ratio to reach, save the effect of energy consumption.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention one hybrid excavator movable arm potential energy retracting device;
Fig. 2 is the structural representation of the embodiment of the present invention two hybrid excavator movable arm potential energy retracting device.
Wherein, 1: boom cylinder; 1a: loculus; 1b: large chamber; 2: bucket arm cylinder; 3: bucket cylinder; 4: boom cylinder control valve; 5: bucket arm cylinder control valve; 6: bucket cylinder control valve; 7a: the first signaling control unit; 7b: secondary signal control unit; 8a: the three signaling control unit; 8b: the four signaling control unit; 9a: the five signaling control unit; 9b: the six signaling control unit; 10: dynamical element; 11: hydraulic pump/motor assembly; 12: one-way control valve; 13: pressure-control valve; 14: energy regenerating recycling oil circuit; 15: excavator swing arm; 16: accumulator.
Detailed description of the invention
Below in conjunction with drawings and Examples, embodiments of the present invention are described in further detail.Following examples for illustration of the present invention, but can not be used for limiting the scope of the invention.
In describing the invention, it should be noted that, except as otherwise noted, the implication of " multiple " is two or more; Term " on ", D score, "left", "right", " interior ", " outward ", " front end ", " rear end ", " head ", the orientation of the instruction such as " afterbody " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second ", " the 3rd " etc. only for describing object, and can not be interpreted as instruction or hint relative importance.
In describing the invention, also it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary.For the ordinary skill in the art, visual concrete condition understands above-mentioned term concrete meaning in the present invention.
Embodiment one
As shown in Figure 1, the present embodiment provides a kind of hybrid excavator movable arm potential energy retracting device, and it comprises: boom cylinder 1, hydraulic pump/motor assembly 11 (hydraulic pump or motor sub-assembly) and boom cylinder control valve 4.Boom cylinder control valve 4 is provided with A mouth, B mouth, P mouth, T mouth and D mouth; This boom cylinder control valve 4, when excavator swing arm 15 lifting, makes that its A mouth and P mouth are connected, B mouth and D mouth connect, and D mouth is connected with fuel tank; Boom cylinder control valve 4, when excavator swing arm 15 declines, makes that its A mouth and T mouth are connected, B mouth and P mouth connects; The large chamber 1b of boom cylinder 1 is connected with A mouth; The loculus 1a of boom cylinder 1 is connected with B mouth; The oil-out of hydraulic pump/motor assembly 11 is connected with P mouth, and its oil-in is connected with fuel tank by one-way control valve 12, is connected with energy regenerating and recycles oil circuit 14 between this oil-in and one-way control valve 12; Energy regenerating recycling oil circuit 14 is connected with T mouth, keeps being communicated with, thus realize the recycling to excavator swing arm 15 potential energy for making when excavator swing arm 15 declines between the large chamber 1b of boom cylinder 1 and the oil-in of hydraulic pump/motor assembly 11.
What deserves to be explained is, this potential energy recovery device is not only confined to carry out potential energy recovery to excavator swing arm 15, is equally applicable to the executive component that other carry out lifting or decline.
Concrete, be connected with the first signaling control unit 7a and secondary signal control unit 7b at boom cylinder control valve 4; Wherein, the first signaling control unit 7a and secondary signal control unit 7b, for applying control signal, realizes Automated condtrol.
When excavator swing arm 15 lifting, the first signaling control unit 7a controls boom cylinder control valve 4 and switches to left position, thus make that A mouth and P mouth are connected, B mouth and D mouth connect; Concrete implementation is: the first signaling control unit 7a applies boom cylinder 1 hoist control valve control signal, boom cylinder control valve 4 is made to change to left position, the oil-in of hydraulic pump/motor assembly 11 passes through one-way control valve 12 from fuel tank oil suction simultaneously, fluid flows to A mouth by the P mouth of boom cylinder control valve 4, thus enters the large chamber 1b of boom cylinder 1.The fluid of the loculus 1a of boom cylinder 1 gets back to fuel tank after being connected by the B mouth of boom cylinder control valve 4 and D mouth.
When excavator swing arm 15 declines, secondary signal control unit 7b controls boom cylinder control valve 4 and switches to right position, makes that A mouth and T mouth are connected, B mouth and P mouth connect.Concrete implementation is: secondary signal control unit 7b applies boom cylinder 1 and to decline control valve control signal, boom cylinder control valve 4 is made to change to right position, the fluid of the large chamber 1b of boom cylinder 1 is entered energy regenerating and recycles oil circuit 14 after being connected with T mouth by the A mouth of boom cylinder control valve 4.Further, energy regenerating recycling oil circuit 14 is also provided with the pressure-control valve 13 of shunting, pressure-control valve 13 is connected with fuel tank.After oil return enters energy regenerating recycling oil circuit 14, there are one way valve and overflow valve or safety valve in oil circuit front (wherein, the oil pressure relief of overflow valve or safety valve setting can be thought of as 7 ~ 15MPa usually), these two valves stop oil return directly to get back to fuel tank, make fluid enter the oil-in of hydraulic pump or motor sub-assembly.Then, fluid flows to B mouth by the P mouth of boom cylinder control valve 4, enters the loculus 1a of boom cylinder 1, realizes the recycling of movable arm potential energy.
Should be understood that, the form of the boom cylinder control valve 4 of above-mentioned disclosure can have varied, the combination valve with other function or independently form can be adopted, meet the function that when swing arm or executing agency decline, the large chamber 1b of boom cylinder 1 is communicated with hydraulic pump oil-in, realize boom cylinder 1 function that is communicated with fuel tank of chamber 1b greatly when lifting.
In addition, the form of pressure-control valve 13 is not also limited to, and can be overflow valve or safety valve, the oil pressure relief of pressure-control valve 13 be set to 5-15MPa.Certainly, specifically can be the valve of the similar functions such as switch valve, proportioning valve, for getting rid of unnecessary flow.
In addition, the oil-out of hydraulic pump/motor assembly 11 is also connected with mechanism loading, mechanism loading comprise in bucket arm cylinder 2, bucket cylinder 3, rotary motor or running motor one or more.
Wherein, bucket arm cylinder 2 is connected with the oil-out of hydraulic pump/motor assembly 11 by bucket arm cylinder control valve 5, and bucket arm cylinder control valve 5 is connected to the 3rd signaling control unit 8a and the 4th signaling control unit 8b; When bucket arm cylinder 2 needs extend action, the 3rd signaling control unit 8a controls bucket arm cylinder control valve 5 and switches to right position, makes the fluid flowed out from oil-out enter the large chamber 1b of bucket arm cylinder 2; When bucket arm cylinder 2 needs withdrawal action, the 4th signaling control unit 8b controls bucket arm cylinder control valve 5 and switches to left position, makes the fluid flowed out from oil-out enter the loculus 1a of bucket arm cylinder 2.
Wherein, bucket cylinder 3 is connected with the oil-out of hydraulic pump/motor assembly 11 by bucket cylinder control valve 6, and bucket cylinder control valve 6 is connected to the 5th signaling control unit 9a and the 6th signaling control unit 9b; When bucket cylinder 3 needs extend action, the 5th signaling control unit 9a controls bucket cylinder control valve 6 and switches to right position, makes the fluid flowed out from oil-out enter the large chamber 1b of bucket cylinder 3; When bucket cylinder 3 needs withdrawal action, the 6th signaling control unit 9b controls bucket cylinder control valve 6 and switches to left position, makes the fluid flowed out from oil-out enter the loculus 1a of bucket cylinder 3.
In addition, also other load elements control valves can be set correspondence for other mechanism loadings, its control principle and above-mentioned record same or similar.
Preferably, boom cylinder 1 is one or more in single oil cylinder, two oil cylinder and Multi-cylinder, and combination is versatile and flexible.
Further, the power intake of hydraulic pump/motor assembly 11 is connected with the dynamical element such as motor or motor 10, can be single pump, sundstrand pump, have the motor of pumping function.
To sum up, the present embodiment devises a kind of novel hybrid excavator movable arm potential energy retracting device, directly the high pressure oil return of the large chamber 1b of boom cylinder 1 is guided to the oil-in of hydraulic pump or motor, promote input pressure, effectively make use of potential energy when swing arm or executing agency's decline, reduce the demand power (or moment of torsion) of hydraulic pump or motor, reduce the energy ezpenditure of power source, reach energy-conservation object.
And this apparatus structure is simple, increases part few compared with conventional principle, selecting of different type of machines can be adapted to.It can also realize good energy-saving effect simultaneously, can select relatively low power prime mover, thus reduce equipment cost.
Embodiment two
As shown in Figure 2, the technology contents not repeated description that the present embodiment two is identical with embodiment one, disclosed in embodiment one, content also belongs to content disclosed in the present embodiment two, and the present embodiment two and embodiment one are distinguished and be: recycle on oil circuit 14 at energy regenerating and be also connected with accumulator 16.That is, on the oil circuit between boom cylinder control valve 4 and hydraulic pump or motor sub-assembly oil-in, Fig. 2 can be provided with accumulator 16, improve the yield of movable arm potential energy.Accumulator 16 is a kind of energy savings devices in hydropneumatic system.It is in due course the energy conversion in system is that compression energy or potential energy store, and when system needs, again compression energy or potential energy is changed into the energy such as hydraulic pressure or air pressure and discharges, again mending feed system.
Embodiment three
According to above-described embodiment one and content disclosed in embodiment two, the present embodiment three provides a kind of hybrid excavator, comprises the hybrid excavator movable arm potential energy retracting device of above-mentioned disclosure, has the technique effect identical with it.Compare traditional excavator hydraulic oil road, the demand power (or moment of torsion) of hydraulic pump or motor can be reduced, that is, reduce the power stage of the dynamical element such as motor or motor 10, reduce its energy ezpenditure, reach energy-conservation object with this.
Embodiments of the invention provide in order to example with for the purpose of describing, and are not exhaustively or limit the invention to disclosed form.Many modifications and variations are apparent for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.
Claims (10)
1. a hybrid excavator movable arm potential energy retracting device, is characterized in that, comprising:
Boom cylinder control valve, described boom cylinder control valve is provided with A mouth, B mouth, P mouth, T mouth and D mouth; Described boom cylinder control valve, when excavator swing arm lifting, makes that its A mouth and P mouth are connected, B mouth and D mouth connect, and described D mouth is connected with fuel tank; Described boom cylinder control valve, when descending movable arm of excavator, makes that its A mouth and T mouth are connected, B mouth and P mouth connects;
Boom cylinder, the large chamber of described boom cylinder is connected with A mouth; The loculus of described boom cylinder is connected with B mouth;
Hydraulic pump/motor assembly, the oil-out of described hydraulic pump/motor assembly is connected with P mouth, and its oil-in is connected with fuel tank by one-way control valve, is connected with energy regenerating and recycles oil circuit between this oil-in and described one-way control valve; Described energy regenerating recycling oil circuit is connected with T mouth, for making to keep being communicated with between the large chamber of described boom cylinder and the oil-in of described hydraulic pump/motor assembly when descending movable arm of excavator.
2. hybrid excavator movable arm potential energy retracting device according to claim 1, is characterized in that, described boom cylinder control valve is connected with the first signaling control unit and secondary signal control unit;
When described excavator swing arm lifting, described first signaling control unit controls described boom cylinder control valve and switches to left position, makes that A mouth and P mouth are connected, B mouth and D mouth connect;
When described descending movable arm of excavator, described secondary signal control unit controls described boom cylinder control valve and switches to right position, makes that A mouth and T mouth are connected, B mouth and P mouth connect.
3. hybrid excavator movable arm potential energy retracting device according to claim 1, is characterized in that, described energy regenerating recycling oil circuit is provided with the pressure-control valve of shunting, and described pressure-control valve is connected with fuel tank.
4. hybrid excavator movable arm potential energy retracting device according to claim 3, is characterized in that, described pressure-control valve is overflow valve or safety valve, and the oil pressure relief of described pressure-control valve is set to 5-15MPa.
5. hybrid excavator movable arm potential energy retracting device according to claim 1, it is characterized in that, the oil-out of described hydraulic pump/motor assembly is also connected with mechanism loading, described mechanism loading comprise in bucket arm cylinder, bucket cylinder, rotary motor or running motor one or more.
6. hybrid excavator movable arm potential energy retracting device according to claim 5, it is characterized in that, described bucket arm cylinder is connected with the oil-out of described hydraulic pump/motor assembly by bucket arm cylinder control valve, and described bucket arm cylinder control valve is connected to the 3rd signaling control unit and the 4th signaling control unit;
When described bucket arm cylinder needs extend action, described 3rd signaling control unit controls described bucket arm cylinder control valve and switches to right position, makes the fluid flowed out from oil-out enter the large chamber of described bucket arm cylinder;
When described bucket arm cylinder needs withdrawal action, described 4th signaling control unit controls described bucket arm cylinder control valve and switches to left position, makes the fluid flowed out from oil-out enter the loculus of described bucket arm cylinder.
7. hybrid excavator movable arm potential energy retracting device according to claim 5, it is characterized in that, described bucket cylinder is connected with the oil-out of described hydraulic pump/motor assembly by bucket cylinder control valve, and described bucket cylinder control valve is connected to the 5th signaling control unit and the 6th signaling control unit;
When described bucket cylinder needs extend action, described 5th signaling control unit controls described bucket cylinder control valve and switches to right position, makes the fluid flowed out from oil-out enter the large chamber of described bucket cylinder;
When described bucket cylinder needs withdrawal action, described 6th signaling control unit controls described bucket cylinder control valve and switches to left position, makes the fluid flowed out from oil-out enter the loculus of described bucket cylinder.
8. hybrid excavator movable arm potential energy retracting device according to claim 1, is characterized in that, described boom cylinder is one or more in single oil cylinder, two oil cylinder and Multi-cylinder.
9. hybrid excavator movable arm potential energy retracting device according to claim 1, is characterized in that, described energy regenerating recycling oil circuit is connected with accumulator.
10. a hybrid excavator, is characterized in that, comprises the hybrid excavator movable arm potential energy retracting device according to any one of claim 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510788265.7A CN105421509B (en) | 2015-11-16 | 2015-11-16 | A kind of hybrid excavator movable arm potential energy retracting device and hybrid excavator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510788265.7A CN105421509B (en) | 2015-11-16 | 2015-11-16 | A kind of hybrid excavator movable arm potential energy retracting device and hybrid excavator |
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| CN105421509B CN105421509B (en) | 2017-11-10 |
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| CN111287250A (en) * | 2020-03-03 | 2020-06-16 | 江苏师范大学 | Excavator movable arm energy recycling system combining oil liquid mixing and oil-electricity mixing |
| WO2024022460A1 (en) * | 2022-07-28 | 2024-02-01 | 徐州徐工矿业机械有限公司 | Hydraulic system and control method for leveling cylinder of face shovel hydraulic excavator |
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| CN111287250A (en) * | 2020-03-03 | 2020-06-16 | 江苏师范大学 | Excavator movable arm energy recycling system combining oil liquid mixing and oil-electricity mixing |
| WO2024022460A1 (en) * | 2022-07-28 | 2024-02-01 | 徐州徐工矿业机械有限公司 | Hydraulic system and control method for leveling cylinder of face shovel hydraulic excavator |
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| Publication number | Publication date |
|---|---|
| CN105421509B (en) | 2017-11-10 |
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